US1539412A

US1539412A - Sound-reproducing device

Info

Publication number: US1539412A
Application number: US409292A
Authority: US
Inventors: Eckelbarger Zena
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-09-09
Filing date: 1920-09-09
Publication date: 1925-05-26
Anticipated expiration: 1942-05-26

Description

May 26, 1925. 1,539,412

2. ECKELBARGER SOUND REPRODUCING DEVICE Filed Sept. 9, 1920 N N N a -{Invent0r ztness: W 5

. 7 mm fimwi o Atzarneg Patented May 26, 1925.

UNITED STATES PATENT I-TOFFICIE.

noxmnnenn, or eosnnn, INDIANA. sourm-nnrnonucme nnvicn Application filed September 9, 1920. Serial No. 409,292.

To all whom it may concern:

Be it known that I, ZENA EOKELBARGER,

a citizen of the United States, residing at Goshen, county of Elkhart, Indiana, have 5 invented certain new and useful Improvements in Sound-Reproducing Devices, of

which the following is a specification.

My invention relates to reproducers for use in sound reproducin machines, and especially to the stylus and stylus bar thereof. The main object of my invention 1's the production of a multistylus device which when applied to a sound reproducing machine will enable the machine operator to 15 play or reproduce the sound from any existmg musical or sound reproducmg record.

Other objects of my invention are mentioned and described herein.

The preferred embodiment of my invention is illustrated in the accompanying drawing in which Figure 1 is a side elevation of my invention applied to the sound box and tone arm of a sound reproducing machine; Fig. 2 is an enlarged plan view of 25 the invention showing its connection with and relation to' the sound box, and showing also the pivotally mounted-stylus arms;

Fig. 3 is a fragment showing one of the stylus arms inoperative position and the others inoperative; Fig. 4 is a view showing the sound boxswung at a different angle or plane to enable the engagement of a different record; Fig. 5 is a section taken on the line 5- 5 of Fig. 2; Fig. 6 is a fragment in section of the tone arm and sound box connection; and Fig. 7 is a section taken on the line 77 of Fig; 6.

Similar numerals of reference indicate like members and parts of members throughout the several views on the drawing.

On the drawing, the numeral 1 indicates a fragment of a tone arm of a sound reproducin machine and numeral 2 an extension t ereof, one end whereof is revolubly fitted within the tone arm socket 3. The numeral 4 indicates a slot formed in the Wall of the end of member 2 and extending circumferentially thereof, into, which slot a stop. pin 5 projects, said pin being mounted in the wall of the socket member the forward end 23 whereof may be screw 3, whereby the arm extension 2 may be rotated insaid'socket for a half circle and stopped at a predetermined point. The nu meral 6 indicates a bend portion of the tone armextension 2 with which the sound box 7 is revolubly connected, as hereinafter described and illustrated in Fig. 6 of the drawmg.

Numeral 8 indicates the sound box bearin'g bore within which is' arranged the bear- 60 mg portion 9 of the tone arm bend 6, the shoulder 10 thereof being engaged by the body of thebox 7. Numeral 11 indicates a nut screw threaded upon the lower end of the bearing portion 9 and against which a wave spring washer 12 bears, said washer encompassing the member 9 between the nut 11 and sound box body and is adapted to prevent vibration of the parts as well as casual rotation of the sound box 7. The sound box 7 is adapted to be rotated on its bearin 9 within certain limits less than a half clrcle, to effect which function the arcuate slot 14 is formed in the body 7, which slot is engaged by a stop lug 13 carried by the tone arm bend 6. See Fig. 7.

The numeral 15 indicates a vibratory stylus bar of any suitable material or form, which bar is connected with the diaphragm (not shown) mounted in the sound box 7. The bearing end of the stylus bar 15 is provided with a hub member 15from which the

opposed trunnion members

16 and 17 project, said trunnion members having cone bearin connections with the conically pointe bearing

pins

18 and 19 which are screw threaded into the

bearing brackets

20 and 21 to enable adjustment of said pins. The numeral 22 indicates a stylus carrier 9o threaded into a socket 2 1 formed in the hub 15 axially of the stylus-bar 15, said carrier being provided with the cylindrical bearing portion 25 adjacent the stud portion 23.

Numeral 26 indicates a multistylus member provided with the bore 26 within which bore the bearing portion 25 of the carrier 22 is arranged, said member 26 being adapt ed for rotation thereon within certain predetermined limits. Numerals 27 and 28 indicate stylus arms projecting from the carrier member 26 at substantially opposite positions thereon and spaced from each other by substantially one hundred eighty degrees, said arms being provided with the points 29 and 30, respectively, which points are parts of well known devices now in common use and each adapted to play, or engage operatively a difierent kind'of sound reproducing recor cates a needle socket formed in the member 22 and substantially axially of the socket 23, said socket being adapted to receive and contain a fibre or metal stylus or needle of any suitable shape of a well known make now in extensive use'and adapted to engage a sound reproducing record, which needle may be secured within said socket by a set screw 32 carried by the member 22.

Numeral 33 indicates a stop lug projecting from the face of the hub member 15 and extending into the arcuate slot 34 formed in the opposing face of the bearing hub or member 26, the end walls of said slot being adapted to serve as abutments to arrest said stop lug and to prevent the multistylus member 26 from rotary movement beyond predetermined positions. The numeral 35 indicates a wave spring washer mounted upon the end of the bearing 26 and between the carrier 26 and the shoulder 36 of member 22, which washer is adapted to engage and exert a resilient thrust upon the member 26 to prevent vibration thereof as well as casual rotation thereof.

It should be appreciated that the sound box 7 may be of any suitable construction or design, and that the joint connecting the arms 1 and 2 may be of the structure and design shown and described herein or similar to that shown and described in my United States Patent No. 1,269,266, June 11, 1918, to enable the rotation of the arms 2 through an arc of one hundred eighty degrees. When the sound box 7 and arm 2 are positioned as indicated in Fig. 1 of the drawing, either of the

stylus arms

27 and 28 may be brought into operative position by rotating the member 26 a half revolution, thereby enabling the operator to reproduce sound from-two different kinds of sound reproducing records. See also Fig. 3 which is a fragmentary view showing the stylus arm 27 in operative position and with the arm 28 swung opposite thereto. In Fig. 4 a third position of the stylus carrier is shown, whereby a third kind of sound reproducing record may be used, which position is gained by rotating the arm 2 through one hundred eighty degrees and efiecting a partial revolution of the sound box 7 on its bearing 9 subsequent thereto, whereby the needle socket 31 is brought into operative position,

The numeral 31 indias indicated in said figure of the drawing.

.It should be appreciated that the function of the spring washer 35 is important for it servesto maintain the juxtaposition of the carrier member 26 at all times, especially when the stop lug 33 is in engagement with either end wall of the arcuate slot 34 when either of the

arms

27 and 28 is brought into operative position, as, described.

Iclaim:

1. In combination with a stylus bar, a stylus carrier extendin axially with respect thereto; and a" plurality of stylus carriers movably associated therewith and extending radially therefrom said carriers being adapted to hold different types of stylus members in position for playing different forms of disk records.

2. In combination with a sound arm, a sound box arranged with its axis transverse to that of said arm, said sound box bein rotatable about the axis of the arm and abou its own axis; a stylus bar carried by the box; a stylus carrier fixedly mounted on the stylus bar, and another stylus carrier movably mounted on said bar, said carrier being adapted to assume. operative positions upon movement of said sound arm to different positions with respect to said sound arm.

3. In combination with a sound box, a stylus bar pivoted thereto; a shaft in alignment with the bar and carried thereb stylus carriers rotatable about the sha and a stylus carrier in alignment with the bar.

4. In a device of the class described and in combination with a sound box, a stylus bar pivoted thereto; a shaft in alignment with the bar and carried thereby; a stylus carrier rotatable about the shaft; and a stylus carrier in alignment with the bar.

5. In a device of the class described and in combination with a sound box, a stylus bar pivoted thereto; a shaft in alignment with the bar and carried thereby; a stylus carrier rotatable about the shaft; and a lsoocketed stylus carrier in alignment with the ar. 6. The combination with an adjustable sound box, of a stylus bar having an axially extending stylus holding member at its free end for use when the sound box is adjusted ma am sound box, of a stylus bar having axially extending stylus holding means at its free end for use when the sound box is adjusted in one position, a multiple stylus carrier ro- 5 tatablymounted around an intermediate portion of said bar, and different types of stylus members mounted upon said carrier position.

fixed my ber, 1920.

:for use interchangeably with'one another when the sound box is adjusted in another In testimony whereof I have hereunto afsignature this 7th day of Septem- ZENA EOKELBARGER.